The saudis couldnt fight a troop of girl scouts armed with cookies, which is why they allow the infidel American Marines to have bases in their 'kingdom'....the Americans are protecting them. (and their oil interests of course)
The saudis are terrified of others in the region coming in and overtaking them, they are nothing but soft girly men prancing around in robes and enjoying their oil wealth, they couldnt win a fight against anyone in that region.